手工编写servlet

手工编写servlet

index.jsp:

 1 <%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>

 2 <%

 3 String path = request.getContextPath();

 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

 5 %>

 6 

 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

 8 <html>

 9   <head>

10     <base href="<%=basePath%>">

11     

12     <title>My JSP 'index.jsp' starting page</title>

13     <meta http-equiv="pragma" content="no-cache">

14     <meta http-equiv="cache-control" content="no-cache">

15     <meta http-equiv="expires" content="0">    

16     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

17     <meta http-equiv="description" content="This is my page">    

18   </head>

19   

20   <body>

21    <h1>第一个Servlet小例子</h1>

22    <hr>

23    <a href="servlet/HelloServlet">get方式请求HelloServlet</a><br>

24    <form action="servlet/HelloServlet" method="post">

25        <input type="submit" value="用post方式请求HelloServlet" >

26        </form>

27   </body>

28 </html>

 

web.xml:

 1 <?xml version="1.0" encoding="UTF-8"?>

 2 <web-app version="2.5" 

 3     xmlns="http://java.sun.com/xml/ns/javaee" 

 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

 5     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 

 6     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

 7   <display-name></display-name>    

 8   <welcome-file-list>

 9     <welcome-file>index.jsp</welcome-file>

10   </welcome-file-list>

11   

12   <servlet>

13       <servlet-name>HelloServlet</servlet-name>

14       <servlet-class>servlet.HelloServlet</servlet-class>

15   </servlet>

16   <servlet-mapping>

17       <servlet-name>HelloServlet</servlet-name>

18       <!-- 和界面上的超链接一一对应 -->

19       <url-pattern>/servlet/HelloServlet</url-pattern>

20   </servlet-mapping>

21 </web-app>

 

HelloServlet.java

 1 package servlet;

 2 

 3 import java.io.IOException;

 4 import java.io.PrintWriter;

 5 

 6 import javax.servlet.ServletException;

 7 import javax.servlet.http.HttpServlet;

 8 import javax.servlet.http.HttpServletRequest;

 9 import javax.servlet.http.HttpServletResponse;

10 

11 public class HelloServlet extends HttpServlet{

12 

13     @Override

14     protected void doGet(HttpServletRequest request, HttpServletResponse response)

15             throws ServletException, IOException {

16         System.out.println("处理get()请求......");

17         PrintWriter out=response.getWriter();

18         response.setContentType("text/html;charset=utf-8");

19         out.println("<strong>Hello Servet!</strong><br>");

20     }

21 

22     @Override

23     protected void doPost(HttpServletRequest request, HttpServletResponse response)

24             throws ServletException, IOException {

25         System.out.println("处理post()请求......");

26         PrintWriter out=response.getWriter();

27         response.setContentType("text/html;charset=utf-8");

28         out.println("<strong>Hello Servet!</strong><br>");        

29     }

30     

31 }

 

你可能感兴趣的:(servlet)